I have two boards : an EV-ADF4159EB1Z eval board and a prototype with an ADF4159 + 5-10 GHz VCO.
The two boards work well but I have a lot of spurious noise. It is a sweep noise like frequency modulation and covers span band wtih "Max hold" function on spectrum analyser.
I have attached printed screen of spectrum analyser .
I don't understand why I have this spurious noise.
Thanks in advance for your answers.